ASTM C580-18(2023)

Standard Test Method for Flexural Strength and Modulus of Elasticity of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes

SIGNIFICANCE AND USE
4.1 This test method is generally applicable to rigid and semirigid materials. Although flexural strength cannot be determined for those materials that do not break, tangent modulus of elasticity can be determined.  
4.2 The results obtained by this test method should serve as a guide in, but not as the sole basis for, selection of a chemical-resistant material for a particular application. No attempt has been made to incorporate into this test method all the various factors that may affect the performance of a material when subjected to actual service.  
4.3 In addition to the tangent modulus of elasticity, a secant modulus is calculated at the point on the stress-strain (load-deflection) graph where the strain is 50 % of the maximum strain.
SCOPE
1.1 This test method covers the determination of flexural strength and modulus of elasticity in flexure of cured chemical-resistant materials in the form of molded rectangular beams. These materials include mortars, brick and tile grouts, structural grouts, machinery grouts, monolithic surfacings (60 mils or greater), and polymer concretes. These materials shall be based on resin, silicate, silica, or sulfur binders.  
1.2 A bar of rectangular cross section is tested in flexure as a simple beam in center point loading: the bar rests on two supports and the load is applied by means of a loading nose midway between supports.  
1.3 Method A outlines the testing procedure generally used for systems containing aggregate less than 0.2 in. (5 mm) in size. Method B covers the testing procedure generally used for systems containing aggregate from 0.2 in. to 0.4 in. (10 mm) in size. Method C is used for systems containing aggregate larger than 0.4 in.  
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-May-2023
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.46 - Industrial Protective Coatings

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C580 − 18 (Reapproved 2023)
Standard Test Method for
Flexural Strength and Modulus of Elasticity of Chemical-
Resistant Mortars, Grouts, Monolithic Surfacings, and
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Polymer Concretes
This standard is issued under the fixed designation C580; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This test method covers the determination of flexural
strength and modulus of elasticity in flexure of cured chemical-
2. Referenced Documents
resistant materials in the form of molded rectangular beams.
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2.1 ASTM Standards:
These materials include mortars, brick and tile grouts, struc-
C904 Terminology Relating to Chemical-Resistant Nonme-
tural grouts, machinery grouts, monolithic surfacings (60 mils
tallic Materials
or greater), and polymer concretes. These materials shall be
C1312 Practice for Making and Conditioning Chemical-
based on resin, silicate, silica, or sulfur binders.
Resistant Sulfur Polymer Cement Concrete Test Speci-
1.2 A bar of rectangular cross section is tested in flexure as
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mens in the Laboratory (Withdrawn 2021)
a simple beam in center point loading: the bar rests on two
E4 Practices for Force Calibration and Verification of Test-
supports and the load is applied by means of a loading nose
ing Machines
midway between supports.
E177 Practice for Use of the Terms Precision and Bias in
1.3 Method A outlines the testing procedure generally used
ASTM Test Methods
for systems containing aggregate less than 0.2 in. (5 mm) in
E691 Practice for Conducting an Interlaboratory Study to
size. Method B covers the testing procedure generally used for
Determine the Precision of a Test Method
systems containing aggregate from 0.2 in. to 0.4 in. (10 mm) in
size. Method C is used for systems containing aggregate larger
3. Terminology
than 0.4 in.
3.1 Definitions—For definitions of terms used in this test
1.4 The values stated in inch-pound units are to be regarded method, see Terminology C904.
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only 4. Significance and Use
and are not considered standard.
4.1 This test method is generally applicable to rigid and
1.5 This standard does not purport to address all of the semirigid materials. Although flexural strength cannot be
safety concerns, if any, associated with its use. It is the determined for those materials that do not break, tangent
responsibility of the user of this standard to establish appro- modulus of elasticity can be determined.
priate safety, health, and environmental practices and deter-
4.2 The results obtained by this test method should serve as
mine the applicability of regulatory limitations prior to use.
a guide in, but not as the sole basis for, selection of a
1.6 This international standard was developed in accor-
chemical-resistant material for a particular application. No
dance with internationally recognized principles on standard-
attempt has been made to incorporate into this test method all
ization established in the Decision on Principles for the
the various factors that may affect the performance of a
Development of International Standards, Guides and Recom-
material when subjected to actual service.
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This test method is under the jurisdiction of ASTM Committee D01 on Paint For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and Related Coatings, Materials, and Applications and is the direct responsibility of contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Subcommittee D01.46 on Industrial Protective Coatings. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved June 1, 2023. Published June 2023. Originally the ASTM website.
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approved in 1965. Last previous edition approved in 2018 as C580 – 18. DOI: The last approved version of this historical standard is referenced on
10.1520/C0580-18R23. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C580 − 18 (2023)
4.3 In addition to the tangent modulus of elasticity, a secant 6. Test Specimens
modulus is calculated at the point
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